![]() The YOUCANIC scanner can also perform diagnostic tests on various systems, including the ABS, airbag, and steering systems, to help pinpoint the root cause of any issues. This advanced diagnostic tool can read and interpret the fault codes stored in your car’s computer system, providing detailed information about any problems with the engine, transmission, brakes, or other critical systems. If you’re experiencing problems with your Mercedes-Benz, a YOUCANIC full system diagnostic scanner can help you troubleshoot the issues. What Scanner Can I Use to Diagnose Mercedes-Benz Check Engine Light Problems? Of course, the vacuum leak doesn’t have to be at the brake booster it can be in any of the vacuum lines attached to the intake manifold. Air is being pulled into the engine and not measured by the MAF sensor triggering the P0170 P0173 fault codes. When there is a crack on the diaphragm or the O-rings of the brake booster, you will hear an air hissing sound near the brake pedal. The vacuum on one side of the brake booster diaphragm pulls the brake cylinder when you press the brakes. The vacuum helps to add pressure to the brake system. In one case, an ML-Class we worked on had a vacuum leak by the brake booster. If the CEL stays on after you replace the MAF, there is a good chance of a vacuum leak somewhere. Replaced MAF sensor, but P0170 P0173 is still on Get an expert to look at your short-trim and long-trim fuel readings. ![]()
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